showing or having no interest, energy etc

uncaring, disinterested

(of a person) showing no sign of feeling

aloof, cool

not influenced by personal feelings; not referring to any particular person

cold, unfriendly

of, connected with, produced by, machines; (of a person, action) done like machines (as if) without thought

done by machine; machinelike

calm and unemotional (about trouble)

unemotional

not enthusiastic

apathetic